The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 17, 2006
Filed:
Jan. 27, 2005
Takako Hibi, Tokyo, JP;
Kazunori Noguchi, Tokyo, JP;
Mari Miyauchi, Tokyo, JP;
Akira Sato, Tokyo, JP;
Takako Hibi, Tokyo, JP;
Kazunori Noguchi, Tokyo, JP;
Mari Miyauchi, Tokyo, JP;
Akira Sato, Tokyo, JP;
TDK Corporation, Tokyo, JP;
Abstract
A multilayer ceramic capacitorhaving internal electrode layers, internal dielectric layershaving the thickness of less than 2 μm, and external dielectric layerswherein; the internal dielectric layersand the external dielectric layersinclude a plural number of dielectric particles, and when yis ratio(D/D) of Dand Dwhere Dis an average particle size of dielectric particlesincluded in the internal dielectric layersand Dis an average particle size of dielectric particlesincluded in the external dielectric layerand located at least 5 μm away from an internal electrode layer, arranged outermost part of all the internal electrode layers, to the stacked direction, and x is thickness of the internal dielectric layer, yand x satisfy the following equations, y≦−0.75x+2.275 and y≧−0.75x+1.675. According to the present invention, even when thickness of internal dielectric layerswere made thinner, a multilayer ceramic capacitorwherein improvements in all kinds of electric characteristics, specially an improvement in TC bias characteristic while having sufficient dielectric constant can be expected.